package com.jingdianjichi.project.domain.util;

import com.alibaba.fastjson.JSON;
import com.google.common.cache.Cache;
import com.google.common.cache.CacheBuilder;
import org.codehaus.plexus.util.StringUtils;
import org.springframework.stereotype.Component;
import org.springframework.util.CollectionUtils;

import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.TimeUnit;
import java.util.function.Function;

/**
 * ClassName:CacheUtil
 * Package:com.jingdianjichi.subject.domain.util
 * Description:
 *
 * @Author fst
 * @Create 2025/1/4 20:49
 * @Version 1.0
 */

@Component
public class CacheUtil <K,V>
{
     private Cache<String,String> localCache=
            CacheBuilder.newBuilder().maximumSize(5000).
                    expireAfterWrite(10, TimeUnit.SECONDS).
                    build();

     public List<V> getResult(String cacheKey, Class<V> clazz, Function<String,List<V>> function)
    {
        List<V> resultList =new ArrayList<>();

        String content=localCache.getIfPresent(cacheKey);


        if(StringUtils.isNotBlank(content))
        {
            resultList=JSON.parseArray(content,clazz);
        }
        else
        {
            resultList = function.apply(cacheKey);

            if(!CollectionUtils.isEmpty(resultList))
            {
                localCache.put(cacheKey, JSON.toJSONString(resultList));
            }
        }

        return resultList;
    }
}
